Question

If three faradays of electricity is passed through the solution of AgNO3, CuSO4 and AuCI3, the molar ratio of the cations deposited at the cathodes will be (a) 1 : 1 : 1 (b) 1 : 2 : 3 (c) 3 : 2 : 1 (d) 6 : 3 : 2​

Answer 1

Explanation:

Correct option is

D

6:3:2

AgNO

3

+e

−

→Ag+NO

3

−

CuSO

4

+2e

−

→Cu+SO

4

2−

AuCl

3

+3e

−

→Au+3Cl

−

If three faradays of electricity is passed through the solution of

AgNO

3

,CuSO

4

and AuCl

3

3 moles,

2

3

moles and 1 mole of the cations will be deposited at the cathodes .

The molar ratio of the cations deposited at the cathodes will be 3:

2

3

:1 or

6:3:2

Answer 2

Explanation:

AgNO

3

+e

−

→Ag+NO

3

−

CuSO

4

+2e

−

→Cu+SO

4

2−

AuCl

3

+3e

−

→Au+3Cl

−

If three faradays of electricity is passed through the solution of

AgNO

3

,CuSO

4

and AuCl

3

3 moles,

2

3

moles and 1 mole of the cations will be deposited at the cathodes .

The molar ratio of the cations deposited at the cathodes will be 3:

2

3

:1 or

6:3:2